Excessive Oil Smoke From the Exhaust On Cold Start – 2016 Cadillac ATS

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Bulletin No.: PIP5680D Published date: 09/7/2021 Preliminary Information PIP5680D Excessive Oil Smoke From the Exhaust On Cold Start Models Brand: Cadillac Model: ATS Model Years: 2016 VIN: from to All All Engine: 3.6L LF4 All Transmissions: Involved Region or Country Condition Cause North America Some customers may comment that after vehicle sits overnight or for several days that upon starting the engine they notice white or blue smoke coming from the exhaust. This may be more noticeable when starting the vehicle using the remote start. Engineering has determined that this condition may be cause by manufacturing debris coming from the intake manifold. This debris can become embedded in the cylinder bores causing accelerated piston ring and cylinder bore wear. Correction: To check for this concern first inspect the outlet of the turbochargers for the presence of oil with dye in the system. (See below) If oil is found at the outlet of the turbocharger on either side, then replace the turbocharger, drive to clean out the exhaust and then let sit to get cold and reevaluate. If no oil at the turbocharger outlet then inspect for PCV operation and check for crankcase pressure. If the PCV system is operating correctly and there is crankcase pressure then the above condition is the likely concern. If this condition is found it will be necessary to replace the engine assembly and the intake manifold. Also it will be necessary to clean out the PCV hoses and valves when replacing the necessary components. Once repair is completed reevaluate the concern. NOTE: The new engine may come with a different oil pan and flywheel / flexplate than the original. If this is the case then those components will need to be reused from the original engine or replaced. Warranty Information For vehicles repaired under the Powertrain coverage, use the following labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage information. Labor Operation Description Labor Time 4067490 Engine Replacement Use Published Labor Time Version History Version 5 09/26/2019 – Created on. 01/30/2020 – Updated Correction Information. 08/24/2020 – Added Note about engine restriction PI and the need for a TAC Modified case. 11/16/2020 – Updated information regarding engine availability. 09/07/2021 – Removed restriction information and need for a TAC case. Also part swap information edited.
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